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Stay safe with the IRD

File and pay your tax · Course 9 · Lesson 2 of 8

What is an estimated assessment and what should I do if I receive one?

  • 2 min read
  • Checked 29 October 2026
In this course · 2 of 8
Otty, the OCTIS octopus

The short answer

An estimated assessment is a tax charge the Inland Revenue Department (IRD) raises on its own estimate when a Hong Kong profits tax return has not been filed by the due date. Do not ignore it: file the correct return, lodge a written objection within one month of the notice date, and ask the IRD to hold over the tax, which it may allow on conditions such as buying Tax Reserve Certificates.

When a profits tax return is not lodged by its due date (including any extended date), the Inland Revenue Department (IRD) may issue an estimated assessment using whatever information it has. These are often much higher than real profits.

What to do

  1. Note the notice date. You have one month from the date of the notice of assessment to give written notice of objection (section 64). The IRD can extend this only where you were prevented by absence from Hong Kong, sickness or other reasonable cause.
  2. File the return and accounts promptly. Include all the required documents and the tax computation.
  3. Object in writing and state precisely why, for example "the assessable profits are HK$X as shown in the return".
  4. Ask to hold over the tax. The IRD may stand over the tax subject to conditions, such as buying Tax Reserve Certificates for part of the disputed amount.
  5. Pay what is due by the date on the notice, or apply for instalments. Tax not paid by the due date is in default and a 5% surcharge can apply to the balance.

Risks of leaving it: if the assessment becomes final, you are bound to pay it. Repeated estimated assessments can also lead to higher penalty percentages for late filing.

An estimated assessment does not replace the return; the IRD can still seek penalties for the late return.

Legal basis and sources

The law

  • Inland Revenue Ordinance (Cap. 112), s.59
  • Inland Revenue Ordinance (Cap. 112), s.64
  • Inland Revenue Ordinance (Cap. 112), s.71

General information for business owners, not legal, tax or professional advice. Rules change, so check the sources or ask a licensed professional before you act.

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    What is an estimated assessment and what should I do if I receive one? | OCTIS